[NOTE]1.After installing the controller, if your electric scooter cannot switch on, please upgrade your APP and connect your electric scooter to the APP and check the cause of startup failure. 2.Only the main controller is damaged, not the board damaged, you can directly replace it. APPLICATION-- Controller applicable to S1 S2 S3 electric scooter or other electric scooters. High quality upgraded mainboard, perfect replacement motherboard for your scooter. QUALITY MATERIALS-- Made of high-quality metal, it has maximum durability and long service life.It is not easy to short circuit after correct installation. CENTRALIZED CONTROL-- Riginal control board forelectric scooter, Centralized control the whole system of scooter include speed control/module/component harmonize/ monitoring etc. EASY TO INSTALL--Installation and disassembly are very convenient, fast and time-consuming, long service life and practical. Colour:As Shown Material:Aluminum + electronic components + plastic Package Contents: 1 set x electric scooter controller motherboard for S1 S2 S3 Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.